Zarchi Ali Akbar Karimi, Vatani Hadi
Department of Epidemiology & Biostatistics, Baqiyatallah, University of Medical Sciences, Faculty of Health, Tehran, Islamic Republic of Iran.
Vector Borne Zoonotic Dis. 2009 Apr;9(2):197-200. doi: 10.1089/vbz.2007.0230.
The presence of cockroaches has health implications, such as nosocomial infection, as the insects move freely from areas within and around hospitals that may harbor pathogenic organisms. The goals of the present study were to determine species of bacteria isolated from cockroaches found in three Tehran hospitals, and to determine distribution of potential vectors by species and sex. The study is descriptive laboratory research. A total of 305 cockroaches from three species were trapped and identified: Periplaneta americana (65.6%), Blatella germanica (12.1%), and Blatta orientalis (22.3%). From these potential vectors, 19 species of bacteria were isolated and identified. After transportation of cockroaches to the laboratory, separation of the whole-homogenized suspension of each species was carried out. Identification of the isolated bacteria was performed according to Burgey's Manual of Determinative Bacteriology, 9th Edition. The most common species of bacteria isolated from cockroaches were Escherichia coli, Streptococcus Group D, Bacillus spp., Klebsiella pneumoniae, and Proteus vulgaris. No statistical significance was found between sex and species of cockroach carrying bacteria (p > 0.05), but significance was found for sex in Citrobacter freundii, Staphylococcus aureus, and Streptococcus non-group A&B (p < 0.05).
蟑螂的存在对健康有影响，比如医院感染，因为这些昆虫会在医院内部及周边可能藏有病原体的区域自由活动。本研究的目的是确定从德黑兰三家医院捕获的蟑螂中分离出的细菌种类，并按种类和性别确定潜在传播媒介的分布情况。该研究为描述性实验室研究。共捕获并鉴定了来自三个种类的305只蟑螂：美洲大蠊（65.6%）、德国小蠊（12.1%）和东方蜚蠊（22.3%）。从这些潜在传播媒介中，分离并鉴定出了19种细菌。将蟑螂运至实验室后，对每个种类的全匀浆悬浮液进行了分离。根据《伯杰氏鉴定细菌学手册》第9版对分离出的细菌进行鉴定。从蟑螂中分离出的最常见细菌种类为大肠杆菌、D群链球菌、芽孢杆菌属、肺炎克雷伯菌和普通变形杆菌。携带细菌的蟑螂的性别和种类之间未发现统计学意义（p>0.05），但在弗氏柠檬酸杆菌、金黄色葡萄球菌和非A&B群链球菌中发现了性别差异具有统计学意义（p<0.05）。
